reduce possibility of nil entry

weed/filesys/file.go

@@ -106,7 +106,7 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 
 	glog.V(4).Infof("%v file setattr %+v", file.fullpath(), req)
 
-	_, err := file.maybeLoadEntry(ctx)
+	entry, err := file.maybeLoadEntry(ctx)
 	if err != nil {
 		return err
 	}
@@ -123,12 +123,12 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 
 	if req.Valid.Size() {
 
-		glog.V(4).Infof("%v file setattr set size=%v chunks=%d", file.fullpath(), req.Size, len(file.entry.Chunks))
-		if req.Size < filer.FileSize(file.entry) {
+		glog.V(4).Infof("%v file setattr set size=%v chunks=%d", file.fullpath(), req.Size, len(entry.Chunks))
+		if req.Size < filer.FileSize(entry) {
 			// fmt.Printf("truncate %v \n", fullPath)
 			var chunks []*filer_pb.FileChunk
 			var truncatedChunks []*filer_pb.FileChunk
-			for _, chunk := range file.entry.Chunks {
+			for _, chunk := range entry.Chunks {
 				int64Size := int64(chunk.Size)
 				if chunk.Offset+int64Size > int64(req.Size) {
 					// this chunk is truncated
@@ -143,36 +143,36 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 					}
 				}
 			}
-			file.entry.Chunks = chunks
+			entry.Chunks = chunks
 			file.entryViewCache, _ = filer.NonOverlappingVisibleIntervals(file.wfs.LookupFn(), chunks)
 			file.reader = nil
 		}
-		file.entry.Attributes.FileSize = req.Size
+		entry.Attributes.FileSize = req.Size
 		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Mode() {
-		file.entry.Attributes.FileMode = uint32(req.Mode)
+		entry.Attributes.FileMode = uint32(req.Mode)
 		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Uid() {
-		file.entry.Attributes.Uid = req.Uid
+		entry.Attributes.Uid = req.Uid
 		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Gid() {
-		file.entry.Attributes.Gid = req.Gid
+		entry.Attributes.Gid = req.Gid
 		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Crtime() {
-		file.entry.Attributes.Crtime = req.Crtime.Unix()
+		entry.Attributes.Crtime = req.Crtime.Unix()
 		file.dirtyMetadata = true
 	}
 
 	if req.Valid.Mtime() {
-		file.entry.Attributes.Mtime = req.Mtime.Unix()
+		entry.Attributes.Mtime = req.Mtime.Unix()
 		file.dirtyMetadata = true
 	}
 
@@ -188,7 +188,7 @@ func (file *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *f
 		return nil
 	}
 
-	return file.saveEntry(file.entry)
+	return file.saveEntry(entry)
 
 }